media: Add UMA to record whether encrypted media is enabled

media: Add UMA to record whether encrypted media is enabled

The UMA is recorded when requestMediaKeySystemAccess is called on
non-ClearKey key system but will reported at most once per renderer
process.

BUG=711348
TEST=Manually tested

Review-Url: https://codereview.chromium.org/2824643002
Cr-Commit-Position: refs/heads/master@{#465159}
Committed: https://chromium.googlesource.com/chromium/src/+/604168304f0d95d0fbaf3775b2bd4e1a3ab5dab4

[xhwang, 2017-04-15 00:38:03]

The CQ bit was checked by xhwang@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2017-04-15 00:38:38]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[xhwang, 2017-04-15 00:39:20]

xhwang@chromium.org changed reviewers:
+ ddorwin@chromium.org, isherman@chromium.org, jrummell@chromium.org

[xhwang, 2017-04-15 00:39:20]

xhwang@chromium.org changed required reviewers:
+ jrummell@chromium.org

[xhwang, 2017-04-15 00:39:20]

jrummell: PTAL
isherman: Please UMA OWNERS review
ddorwin: FYI

[jrummell, 2017-04-15 00:57:34]

encrypted_media LGTM

[commit-bot: I haz the power, 2017-04-15 02:14:47]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2017-04-15 02:14:48]

Dry run: This issue passed the CQ dry run.

[Ilya Sherman, 2017-04-17 19:59:06]

Metrics LGTM, thanks

[xhwang, 2017-04-18 05:11:15]

The CQ bit was checked by xhwang@chromium.org

[commit-bot: I haz the power, 2017-04-18 05:11:38]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-04-18 06:54:00]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1492492275299910, "parent_rev":
"c16e5c55c80e613b046190945b1336eca84c5aca", "commit_rev":
"604168304f0d95d0fbaf3775b2bd4e1a3ab5dab4"}

[commit-bot: I haz the power, 2017-04-18 06:54:07]

Description was changed from

==========
media: Add UMA to record whether encrypted media is enabled

The UMA is recorded when requestMediaKeySystemAccess is called on
non-ClearKey key system but will reported at most once per renderer
process.

BUG=711348
TEST=Manually tested
==========

to

==========
media: Add UMA to record whether encrypted media is enabled

The UMA is recorded when requestMediaKeySystemAccess is called on
non-ClearKey key system but will reported at most once per renderer
process.

BUG=711348
TEST=Manually tested

Review-Url: https://codereview.chromium.org/2824643002
Cr-Commit-Position: refs/heads/master@{#465159}
Committed:
https://chromium.googlesource.com/chromium/src/+/604168304f0d95d0fbaf3775b2bd...
==========

[commit-bot: I haz the power, 2017-04-18 06:54:09]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/604168304f0d95d0fbaf3775b2bd...